LS - 3rd Gen (2001-2006) Discussion topics related to the flagship Lexus LS430

Custom cold air intake box

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Old 02-11-18, 05:31 PM
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05ls430518
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Originally Posted by lt1fire
Cool project.... Did you dyno it before so you can see any gains you may get after you are done with it?
Thanks and no I did not the car is away for the winter time and will not be out driving till probably April, May, June. Also the closest dyno near me deal's with Honda's and I do not want them touching my car.
Old 02-14-18, 06:07 AM
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Robles84
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I've seen a sc430 on YouTube with nos... looks pretty responsible good luck
Old 03-20-18, 08:40 PM
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Looks Honda Civic Ghetto
Old 03-20-18, 09:00 PM
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Originally Posted by peasodos
Looks Honda Civic Ghetto
Word I actually track my car so I dont really care, also its better than sucking in hot air from the engine bay so it actually works function over form.

If you have a better way to do it let me know, I am all ears.
Old 03-20-18, 11:25 PM
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Is it spring time yet?
Old 03-20-18, 11:54 PM
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Originally Posted by Scootymad
Is it spring time yet?
Not yet its currently 22°F right now =(. I wish I was over in Australia were you are, I am really itching to drive my car and put the rest of the chassis braces and sway bars on.

Hopefully by mid late march I will be able to drive my car I still have to wait for rain to wash all the salt off the roads as well.
Old 03-20-18, 11:58 PM
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Originally Posted by Robles84
I've seen a sc430 on YouTube with nos... looks pretty responsible good luck
Thanks man I have some big plans for my LS this summer new tint, finally install the rest of the chassis braces and sway bars, hopefully get my exhaust done and possibly some other stuff.
Old 12-11-19, 08:33 AM
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I'm curious about that cold air intake. What is the theory behind it, in other words why is air from your intake colder than the stock air intake behind and above the grille? Is it that the radiator is transferring some heat to the air on its way from the intake to the air filter? Are you after more air flow?
Old 12-11-19, 08:36 AM
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The stock instake is a cold air intake. In fact most cars it is cold air from the fender or top of the grill away from the engine bay.
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Old 12-11-19, 11:17 AM
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Originally Posted by peasodos
The stock instake is a cold air intake. In fact most cars it is cold air from the fender or top of the grill away from the engine bay.
You already talked **** on my car without contributing anything so why dont you leave my thread.
Old 12-11-19, 11:29 AM
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Originally Posted by TominPT
I'm curious about that cold air intake. What is the theory behind it, in other words why is air from your intake colder than the stock air intake behind and above the grille? Is it that the radiator is transferring some heat to the air on its way from the intake to the air filter? Are you after more air flow?
The stock intake would get really warm the part that was by the motor so I did some google foo and read that aluminum dissipates heat faster than plastic so thats what lead me to think if I put the aluminum intake with the heat tape on it then add a aluminum shield it should in theory be much colder air then the stock intake because its sitting between the motor and radiator not on top of the motor.

I also did this set up because I guessed that a cone filter has more surface area than the flat panel filter and it could suck up more air. I also plan to do forced induction of some kind down the road so that was another contributing factor.

The duct works great I have to blow the filter off every now and then to get all the dead bugs and crap off of it.
Old 12-11-19, 11:35 AM
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Originally Posted by 05ls430518
The stock intake would get really warm the part that was by the motor so I did some google foo and read that aluminum dissipates heat faster than plastic so thats what lead me to think if I put the aluminum intake with the heat tape on it then add a aluminum shield it should in theory be much colder air then the stock intake because its sitting between the motor and radiator not on top of the motor.

I also did this set up because I guessed that a cone filter has more surface area than the flat panel filter and it could suck up more air. I also plan to do forced induction of some kind down the road so that was another contributing factor.

The duct works great I have to blow the filter off every now and then to get all the dead bugs and crap off of it.
I like your whole setup. I think it is ingenious.
Old 12-11-19, 11:37 AM
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Thank you very much Sir! I like the design. Maybe if you put some really coarse wire mesh over the intake opening at the bottom you could avoid leaves, paper and other debris from getting sucked in. Just a thought. . .
Old 12-12-19, 07:49 AM
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Originally Posted by TominPT
I'm curious about that cold air intake. What is the theory behind it, in other words why is air from your intake colder than the stock air intake behind and above the grille? Is it that the radiator is transferring some heat to the air on its way from the intake to the air filter? Are you after more air flow?
When you consider the amount of time the air spends inside the intake pipe, between filter and TB, is prob less than a second it's pretty clear there's just not enough time to alter the temp.
The air simply travels through far too quickly to change temp, up or down, in a matter of a second or even less. Put your turkey pot pie in the oven at 400 degrees for 1 second and measure the change.
No dyno in the world will catch a 1 degree (generous estimate) drop in intake air temp by the time it gets to the rear wheels...
Old 12-12-19, 08:21 AM
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Originally Posted by bradland
When you consider the amount of time the air spends inside the intake pipe, between filter and TB, is prob less than a second it's pretty clear there's just not enough time to alter the temp.
The air simply travels through far too quickly to change temp, up or down, in a matter of a second or even less. Put your turkey pot pie in the oven at 400 degrees for 1 second and measure the change.
No dyno in the world will catch a 1 degree (generous estimate) drop in intake air temp by the time it gets to the rear wheels...
I have to disagree parts in the engine bay get heat soaked huge problem on turbo cars


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